I'm in the process of building two Fancherized Twisters from kits that I bought somewhere for what, 25 bucks a piece I think? I just read the article and drew the mods directly on the plans. The only real difference is the fuselage which is longer by about 3 1/2 inches, the stab is pushed back about that amount and the vertical stab is shorter and reshaped. Plus the CG is about an inch father forward.
Other builders have made the horizontal stab and elevators longer spanwise and substituted thicker stock for the flaps but mine are stock. I did make half ribs for the wing as you can see.
This is the electric "take apart" version which is now covered and waiting for the batteries to arrive in the mail. The second Twister is going to be Enya 46 4C powered and should be ready for Brodak this year! Hope these pics help!